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From "Todd Lipcon (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-1971) HA: Send block report from datanode to both active and standby namenodes
Date Tue, 22 Nov 2011 05:20:41 GMT

     [ https://issues.apache.org/jira/browse/HDFS-1971?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Todd Lipcon updated HDFS-1971:
------------------------------

    Attachment: dualbr4.txt

I rebased Sanjay's original patch onto the cleaned up tip of branch and also added some unit
tests.

Most of the tests pass at this point.

One major "TODO" area which causes test failures is around refreshNameNodes() - I intend to
resurrect that after HDFS-2582.
                
> HA: Send block report from datanode to both active and standby namenodes
> ------------------------------------------------------------------------
>
>                 Key: HDFS-1971
>                 URL: https://issues.apache.org/jira/browse/HDFS-1971
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: data-node, name-node
>            Reporter: Suresh Srinivas
>            Assignee: Sanjay Radia
>         Attachments: DualBlockReports.pdf, daulBr1.patch, dualBr2.patch, dualBr3.patch,
dualbr4.txt
>
>
> To enable hot standby namenode, the standby node must have current information for -
namenode state (image + edits) and block location information. This jira addresses keeping
the block location information current in the standby node. To do this, the proposed solution
is to send block reports from the datanodes to both the active and the standby namenode.

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